Everywhere, on the coastal belt it is proved without doubt that the pristine ground
water quality was severely deteriorated after the 26 December 2004 Indian Ocean
Tsunami. But how far is more relevant, as it is decided by the so-called pre-tsunamic
situation of the region. In water quality studies it is this reference finger print which
earmarks regional ground water chemistry based on which the monthly variability
could rationally be interpreted. This Ph D thesis comprises the testing and evaluation of the facts: whether there is any significant difference in the water quality parameters under study between stations
and between months in Tsunami Affected Dug Wells (TADW). Whether the selected
water quality parameters vary significantly from BIS and WHO standards. Whether
the water quality index (WQI) differ significantly between Tsunami Affected Dug
Wells (TADW) and Bore Wells (BW). Whether there is any significant difference in
the water quality parameters during December 2005 and December 2008. Is there any
significant change in the Water Quality Parameters before 2001 and after tsunami
(2005) in TADW.

Description:

School of Environmental Studies, Cochin University of Science and Technology

Files in this item: 1

Haseeb, M; Dr.Bright Singh,I S(Cochin University Of Science And Technology, November , 2012)

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Abstract:

Aquaculture is one of the fastest growing food sectors in the world.
Amongst the various branches of aquaculture, shrimp culture has expanded
rapidly across the globe because of its faster growth rate, short culture period,
high export value and demand in the International market. Indian shrimp
farming has experienced phenomenal development over the decades due to its
excellent commercial viability. Farmers have adopted a number of innovative
technologies to improve the production and to maximize the returns per unit
area. The culture methods adopted can be classified in to extensive, modified
extensive and semi intensive based on the management strategies adopted in
terms of pond size, stocking density, feeding and environmental control. In all
these systems water exchanges through the natural tidal effects, or pump fed
either from creek or from estuaries is a common practice. In all the cases, the
systems are prone to epizootics due to the pathogen introduction through the
incoming water, either brought by vectors, reservoir hosts, infected tissue
debris and free pathogens themselves. In this scenario, measures to prevent the
introduction of pathogen have become a necessity to protect the crop from the
onslaught of diseases as well as to prevent the discharge of waste water in to
the culture environment.The present thesis deals with Standardization of bioremediation technology for zero water exchange shrimp culture system

Description:

School of Environmental Studies,Cochin University of Science and Technology

Water quality of rooftop-collected rainwater is an
issue of increased interest particularly in developing countries where the
collected water is used as a source of drinking water. Bacteriological and
chemical parameters of 25 samples of rooftop-harvested rainwater stored
in ferrocement tanks were analyzed in the study described in this article.
Except for the pH and lower dissolved oxygen levels, all other physicochemical
parameters were within World Health Organization guidelines. Bacteriological
results revealed that the rooftop-harvested rainwater stored in
tanks does not often meet the bacteriological quality standards prescribed
for drinking water. Fifty percent of samples of harvested rainwater for rural
and urban community use and 20% of the samples for individual household
use showed the presence of E. coli. Fecal coliform/fecal streptococci ratios
revealed nonhuman animal sources of fecal pollution. Risk assessment of
bacterial isolates from the harvested rainwater showed high resistance to
ampicillin, erythromycin, penicillin, and vancomycin. Multiple antibiotic
resistance (MAR) indexing of the isolates and elucidation of the resistance
patterns revealed that 73% of the isolates exhibited MAR

The present study aims at the investigation of the
1ysico—chemical features of a tropical tidal river viz.
we Muvattupuzha river. This river is expected to receive
Jderate to heavy pollution loads in years to come, from
we lone industrial unit, already set up on its bank.
ilike other rivers, the geographical disposition of this
Lver attains unique importance as regards its dynamics for
3) availability of natural runoff water from catchment
:eas, which becomes very heavy during the monsoon season
3) regular steady availability of tail race water from a
/dro—electric power station throughout the yearThe study also aims at arriving at the balancing
forces of inherent self~purification of the river verses
pollution loads from the factory effluents. The investigation
period falls ahead of actual pollution occurrence
and so the ambient conditions for a period of nearly
one-and-a—half years were investigated, the analyses of which
providflz to formulate the inter-relations of parameters
varying with seasons. Tracer experiments were carried out
which revealed the dispersion and dilution characteristics
of the river in the vicinity of effluent outfall. The
studv covers the trial—cum-capacity production periods
of the factory during which effluents of various strength
and quantity were discharged into the river; a few computed
values arQ’cjmpgrQdl ... with the observed values. The
base data along with the profiles of Oxygen sag equation have
been utilized fb develop a mathematical model of the
river with regard to its water quality

Description:

Department Of Marine Sciences,Cochin University Of Science And Technology

Files in this item: 1

The water quality and primary productivity of Valanthakad backwater (9° 55 10. 24 N latitude and 76° 20 01. 23 E
longitude) was monitored from June to November 2007. Significant spatial and temporal variations in temperature,
transparency, salinity, pH, dissolved oxygen, sulphides, carbon dioxide, alkalinity, biochemical oxygen demand, phosphatephosphorus,
nitrate-nitrogen, nitrite-nitrogen as well as primary productivity could be observed from the study. Transparency
was low (53.75 cm to 159 cm) during the active monsoon months when the intensity of solar radiation was minimum, which
together with the run off from the land resulted in turbid waters in the study sites. The salinity in both the stations was low (0.10
‰ to 4.69 ‰) except in August and November 2007. The presence of total sulphide (0.08 mg/ l to 1.84 mg/ l) and higher
carbon dioxide (3 mg/ l to 17 mg/ l) could be due to hospital discharges and decaying slaughter house wastes in Station 1 and
also from the mangrove vegetation in Station 2. Nitrate-nitrogen and phosphate-phosphorus depicted higher values and
pronounced variations in the monsoon season. Maximum net primary production was seen in November (0.87 gC/ m3/ day) and
was reported nil in September. The chlorophyll pigments showed higher values in July, August and November with a negative
correlation with phosphate-phosphorus and nitrite-nitrogen. The study indicated that the water quality and productivity of
Valanthakad backwater is impacted and is the first report from the region